stepped concrete placing

例句：

1. 1. The construction crew was instructedto perform stepped concrete placing during the constructionphase.
   施工团队被指示在施工阶段进行分层混凝土浇筑。
2. 2. The engineer carefully monitored theprogress of the stepped concrete placing to ensurequality control.
   工程师仔细监控了分层混凝土浇筑的进度，以确保质量控制。
3. 3. The project managerwas concerned about the safety risks associated withstepped concrete placing, especially in high-rise buildings.
   项目经理对分层混凝土浇筑的安全风险感到担忧，尤其是在高层建筑中。